Support versioning new monorepo multi-tag modules in pre-release

[serpro69]

IF the monorepo project is in pre-release and new module is added, AND the new module is versioned via own tag, THEN the module version should also be postfixed with pre-release identifier.

Close #32

TODO:

• [x] docs
  • see https://github.com/serpro69/semver.kt/tree/master/semantic-versioning#pre-release-versions-with-monorepo-multi-tag-versioning that needs to be updated or removed
  • should at least add a note that initial RC version identifier of the new module is equal to current RC version identifier of root project
  • [x] workflow canvas
• [x] tests